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Toughned Glass Plant India
Toughned Glass Furnace India


Contains Loading Section, Heating Section, Quenching Section, and Unloading Section


Can produce common flat glass, pattern glass, sand-blast glass and opaque glass, concavo-convex glass, reflecting glass and hard filmed, low-E glass.


Ceramic rollers with excellent linearity, roundness and heating deformation. 


Glass is almost 0% distorted during heating period.



Toughened glass or tempered glass is glass that has undergone processes of controlled thermal treatment to increase its strength. It is four times stronger than normal annealed glass. Toughened glass is made from annealed glass that has been heated to approximately 650⁰C and then rapidly cooled. Due to the increased heat treatment and rapid cooling of the glass, the treatment produces different physical properties. This results in compressive stress on the surface and improved bending strength of glass. Before toughening, the glass must be cut to size or pressed to shape.




Toughening does not alter the basic characteristics of glass like light transmission and solar radiant heat properties of normal glass. It can neither be cut, nor altered. Toughened glass is known to have higher thermal strength, with the ability to withstand high temperature changes up to 250°C. A safety glass, toughened glass is difficult to break but in the event of a breakage, disintegrates into small globules . However, it is prone to very rare spontaneous breakage, a condition that occurs when the repeated heating and cooling cause the nickel sulfide stones to increase in size.


First, the glass is carried by rollers and goes through the furnace. Here, three types of modes are used to heat the glass, viz., conduction, convection and radiation. While the rollers help to conduct the heat, the coils enable radiation of heat. This ensures that the glass is evenly heated on every side. By blasting air on both the surfaces, the heated glass is then cooled uniformly.


Toughened Glass is perfect for places that are prone to breakage and need glass that is tough. In buildings, it is suitable for both indoor and outdoor use, especially in sloped glazing, facades, shower cabins, doors, partitions, etc. It is also widely used in the manufacture of appliances like ovens, refrigerators, shelves and fireplace screens. In the automotive industry, it is used in the rear windows of vehicles.

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